config/: Enable all test for 1400.

Signed-off-by: zhanglinjing <Linjing.Zhang@infineon.com>

Author: LinjingZhang

config/user.yml

@@ -38,4 +38,4 @@ unit-test:
    - unit-test-time-1400
    - unit-test-onewire-DS18x20-1400
    - unit-test-analog-io-adc-1400
-   # - unit-test-analog-io-pwm-1400
+   - unit-test-analog-io-pwm-1400